When you get a crown or bridge, you may be asked to choose a material: zirconia, lithium disilicate, or something else. The choice is more than cosmetic. Each material behaves differently, and the design of the restoration has to respect those differences.
Zirconia is known for strength and is often used for back teeth and long bridges, where chewing forces are high. Lithium disilicate is prized for its natural translucency and is popular for front teeth, where appearance matters most. Each has minimum thickness requirements, and a design that ignores them can crack or wear early.
This is where digital design earns its keep. Software can display thickness across the whole restoration, so the designer can confirm that no area is too thin for the material chosen. The shape of the connectors in a bridge, the depth of the biting surface, and the way forces travel through the piece can all be checked in advance.
Experienced teams, including a specialist 3d dental lab, tailor their designs to the material and the location of the tooth. A restoration that would be ideal in one material might need to be reshaped slightly for another.
Your own habits also matter. People who grind their teeth or have a strong bite may need a more robust material or a slightly different design than someone with lighter chewing forces.
If you are offered a choice, ask your dentist why they recommend one material over another for your tooth. The answer tells you a great deal about how the restoration was planned to last.
